Band-saw.



PATENTED MAY 5, 1903.

w. mnnocx s. BAND: SAW. APPLIOAIION FILED JUNE 13, 1902.

H0 MODEL.

Wli asses THE ucanls wzrzns co, wow-urns. V/ASHINGYON,D. c,

UNITED STATES,

Patented May 5, 1903.

PATENT OFFICE.

BAND-SAW.

SFECIFIOATION forming part of Letters Patent l\l o. 72'7,168, dated May 5, 1903.

Application filed June 13, 1202. Serial No. 111,541. (No model- To all whom, it may concern: Be it known'that I, WILLIS, MADDOOKS, a citizen of the United States, residing at East Holden, in the county of Penobscot and State of Maine, have invented a new and useful Band-Saw, of which the following is a speci fication.

The invention relates to improvements in band-saws.

The object of the present invention is to improve the construction of band-saws and to provide a simple and comparatively inexpensive one designed for the manufacture of hoops and adapted to enable the same to be more accurately and rapidly constructed and at thesame time to lessen their cost of manufacture.

A further object of the invention is to provide a feeding mechanism adapted to yield to the varying thickness and to the irregularities ofa pole and of enabling a hoop of uniform thickness to be readily sawed from the same.

The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanyingdrawings, and pointed out in the claims hereto appended.

In the drawings, Figure 1 is an elevation of a band-saw provided with feeding mechanism constructed in accordance with this in-- vention. Fig. 2 is a plan view. Fig. 3 is'a detail sectional view illustrating the manner of mounting the adjustable guide-roll and the yieldingly-mounted feed-roll.

Like numerals of reference designate corresponding parts in all the figures of the drawings. i l designates a band-saw arranged on upper and lower saw pulleys 2 and 3, which are mounted on upper and lower saw-arbors 4 and 5, journaled in'suitable bearings of the frame 6 of the machine and located above and below the table 7 thereof. -The frame ofthe machine may be constructed'inany suitable manner, as will be readily understood and the lower saw-arbor, which carries a drivingpulley 8, has also mounted upon it a steppulley 9, having three different diameters of pulleys and adapted to be connected by a belt 10 with a corresponding pulley 11 of a vertitional engagement ing the cal shaft 12, which operates the feeding mechanism. The pulleys 9 and 11, which are provided with pulley-faces of difierent diameters, are adapted to enable the speed of the feeding mechanism to be varied by adjusting .the belt 10, as will be readily understood. Mounted upon the upper portion of the frame is a hollow stud or sleeve 13, forming the upper bearing for the vertical shaft and capable of adjustment for a purpose hereinafter described. This-hollow stud or sleeve is provided with a slot or opening 14, in which is arranged one end of a resilient arm or spring 15, which has its outer end 16 bifurcated to receive a feed-roll 1 7. The feed-roll 17 is mounted on a short vertical shaft 18, ar-

ranged in bearings 19 of the sides of the bifurcation of thespring or arm and provided at its upper end with a sprocket -pinion 20. The sprocket-pinion 20 receives a sprocket-chain 21, which extends to a similar sprocket-pinion 22, arranged on and secured to the upper end of the vertical shaft 12. The hollow stud or sleeve is capable of rotation to vary the tension of the resilient arm or spring 15 to secure the necessary fricbetween the feed-roll and the material operated on by tho sawing-machine.

The material is supported and guided at the inner side by a rigidlymounted roll 23, arranged vertically and journaled on a vertical spindle 24, and the said guide-roll is grooved "horizontally and is provided with a concave face adapted to conform to the general configuration of a pole and capable of preventsame from accidentally rising during the operation-of sawing. lhe shaft or spindie 24 is adjustably secured in a slot 25 of the able fastening device, and it is adapted to be moved to and from the saw 1 to vary the thickness of the hoop. The lower end of the short shaft 18, which is mounted on, the outer portion of the resilient arm or spring, operates in a guide slot or opening 27 and is provided at its lower end with a nut 28.

The feed-pulley at the outer or free end of the resilient arm or spring is rotated by the sprocket-gearing, which is adapted to oscilla'tewith the arm or spring without having saw-table by means of nut 26 or other suit- 7 its operation affected by such movement, and the yieldingly-mounted feed roll or pulley is adapted to move inward and outward to yield to any inequalities 'or variations in the thickness of the pole being cut. The rotary stud or sleeve which forms the upper bearing for the vertical shaft is adapted to vary the tension of the spring to secure the necessary frictional engagement between the feeding mech anism and the material, and the concave guide-roll is capable of adjustment to Vary the thickness of the hoop and is adapted to prevent the material from rising from the saw-table or from turning thereon. It will also be seen that the belt and the pulleys,

which are provided with faces of different diameters, are adapted to enable the speed of the feeding mechanism to be Varied.

What I claim is 1. In a machine of the class described, the combination with a band-saw, of a resilient arm or spring, a feed-roll carried by the resilient arm or spring, and gearing disposed longitudinally of the resilient armor for rotating the feed-roll, described.

2. In a machine of the class described, the combination with a band-saw, of a vertical shaft, aresilient arm orspring secured at one end adjacent to the vertical shaft,a feed-roll mounted on and carried by the resilient arm or spring, sprocket-pinions connected with the feed-roll and with the vertical shaft, a sprocket-chain arranged on the sprocket-pinspring substantially as remiss ions, and means for operating the vertical shaft, substantially as described.

3. In a machine of the class described, the combination with a band-saw, of a vertical shaft, a hollow stud or sleeve receiving the vertical shaft and forming a bearing for the same and capable of adjustment, a spring or arm secured at one end to the hollow sleeve or stud, a guide-roll mounted on the arm or spring at the other end thereof, gearing connecting the vertical shaft and the feed-roll and adapted to oscillate with the arm or spring, and means for operating the vertical shaft, substantiallyas described.

4. In a machine of the class described, the

. combination of aframe, upper and lower sawarbors, saw-pulleys mounted on thesaw-arbore, a band-saw arranged onthesaw-pulleys, a vertical shaft, pulleys 9 and 11 having a plurality offaces of different diameters, abelt connecting the pulleys 9 and 11, a resilient arm or spring secured at one end adjacent to the vertical shaft, a feed-roll mounted on the arm or spring at the other end thereof, and gearing connecting the feed-roll and the "vertical shaft and adapted to oscillate with the arm or spring, substantially as described.

In testimony thatI claim the foregoin'gas my own I have hereto affixed mysignature in the presence of two witnesses.

WILLIS MADDOCKS. Witnesses:

O. E. WENTWORTH, W. L. MADDOCKS. 

